On Sunday, 12 January 2014 at 10:48:15 UTC, Abdulhaq wrote:
No, try this:
import std.stdio;
class X {}
void foo(X x) { writeln(cast(void*) x); }
void main() {
X x; // null reference by default.
writeln(cast(void*) x);
foo(x);
x = new X;
writeln(cast(void*) x);
foo(x);
}
Thanks Tobias that indeed works, unfortunately storing the
address as ulong in an AA does not seem to be defeating the
garbage collector!
I guess I'll have to go for a WeakRef implementation, I'll try
Robert's implementation in signals, but I'd really like to know
how long it is likely to last as a working weak ref (in terms
of the D GC changing etc.) and if I'm taking the right approach.
Sorry to reply to my own message, looking at Robert's
InvisibleAddress class I think he's hiding the address from the
GC by e.g. rotating the bits in the ulong. He's also made it all
thread safe - I certainly don't understand the details but it's
given me some ideas.
